In the early 2000s I used a raster art to vector art conversaion tool. I THOUGHT it was by Adobe, but I find no trace of it! It had a locomotive as its logo, and I think it was named "steam" or something similar. Required an activation key, wonderful little piece of software. Want to find it again because I back then could quickly convert simple line drawings to vector lines without having to use much system power (unlike, say, opening up Illustrator.)